BONNET-HEAT EXCHANGER 7W1185 - Caterpillar

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Typical Cat ET screen for active diagnostic trouble codes
The following procedures may cause new diagnostic trouble codes to be logged. Therefore, before any procedures are performed, make a list of all the active diagnostic trouble codes to determine the system problems. Clear the diagnostic trouble codes that were caused by the procedure, when each procedure is complete.Note: Before performing a procedure, always check all the circuit breakers. Repair the cause of any circuit breaker that is tripped.A screen is provided in Cat ET for active diagnostic trouble codes. The screen will display the diagnostic trouble codes that are active. Active diagnostic information shall include a component identifier (CID), a failure mode identifier (FMI) and a text description of the problem.Logged Diagnostic Trouble Codes
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Typical Cat ET screen for logged diagnostic trouble codes
A screen is provided in Cat ET for logged diagnostic trouble codes. The screen will display diagnostic trouble codes that are logged. Cat ET will log diagnostic trouble codes that are intermittent. The logged diagnostic data shall include a component identifier (CID), a failure mode identifier (FMI), and a text description of the problem. Also, the logged diagnostic data shall include the number of occurrences of the problem and two time stamps. The time stamp displays the first occurrence of the problem and the time stamp displays the most recent occurrence of the problem.Diagnostics are logged in non-volatile memory. On power, up, the ECM will clear any diagnostic trouble codes that have not been detected or active within the last 150 hours of vehicle operation.Connecting Cat ET and the Communication Adapter III
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(1) Personal computer (PC)
(2) 370-4617 Adapter Cable Assembly
(3) 317-7584 Communication Adapter III
(4) 327-8981 Adapter Cable AssemblyUse the following procedure to connect Cat ET and the Communication Adapter III.
Turn the keyswitch to the OFF/RESET position. If the key switch is not placed in the OFF/RESET position, the engine may start.
Connect cable (2) between the "COMPUTER" end of communication adapter (3) and the "RS232" serial port of PC (1).
Connect cable (4) between the "DATA LINK" end of communication adapter (3) and the service tool connector.
Turn the keyswitch to the ON position. If Cat ET and the communication adapter do not communicate with the other ECM modules, proceed to the next Test Step.Electronic Service Tool Will not Communicate with ECM
Probable Causes
Configuration for the communications adapter
J1/P1 connectors for the other control modules
Communication adapter and/or cables
Electrical power supply to the service tool connector
Caterpillar Electronic Technician (ET) and related hardware
Electrical power supply to the ECM
Override switches
J1939 Data LinkRecommended Actions:
Electrical Power Supply to the Service Tool Connector
Verify that the battery voltage is present between terminal A and terminal B of the service tool connector. If the communication adapter is not receiving power, the power light for the communication adapter will not be on. Proceed to Test Step 2 if the power light is not illuminated. Try turning the key off and shutting down Cat ET if the communication adapter is powered but is still not communicating.Communication Adapter and/or